W 1822 is an international standard used to evaluate the performance of high-efficiency particulate air (HEPA) and ultra-low penetration air (ULPA) filters. The standard defines test methods for measuring filtration efficiency, identifying the most penetrating particle size (MPPS), and verifying filter integrity through leak detection.
“Ensuring high-efficiency filters provide reliable particle removal performance under defined test conditions.”
One of the core principles of EN1822 is testing filter efficiency at the Most Penetrating Particle Size (MPPS).
The MPPS represents the particle size that is most difficult for the filter to capture. Testing at this size ensures that the filter meets its required performance under the most challenging conditions.
In addition to efficiency measurement, EN1822 requires leak testing to verify the integrity of the filter.
During the leak scan test:
This test ensures that the filter frame, seal, and media are free from local defects.
|
Class |
Minimum Efficiency |
|
H13 |
≥ 99.95% |
|
H14 |
≥ 99.995% |
Stable and repeatable measurement conditions are essential to ensure that efficiency results reflect actual filter performance. EN1822 testing is commonly used in:
Filtration testing systems designed for EN1822 procedures typically support:
These systems enable laboratories and manufacturers to perform reliable HEPA filter verification according to international standards.
Tell us your filter type, testing standard, and application scenario.
Our engineers will help you identify the most suitable testing solution — from standard systems to fully customized platforms.
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